Rotary engine



No. 750,169. PATENTED JAN.19, 1904.

' W. I. cooLBY.

ROTARY ENGINE.

APPLIOATION FILED JUNE 19. 1903.

N0 MODEL. 2 SHEETS-SHEET 1.

Illlll No. 750,169. PATENTED JAN. 19, 1904.

' W. I. GooLEY. f

ROTARY ENGINE.

APPLICATION FILED JUNE 19, 1903.- A No MODEL. z'sHEBTs-SHBBT z.

No. l750,169.

UNITED STATES Patented January 19, 1904.

PATENT UEEICE.

WILLIAM I. COOLY, OF SALTVILLE, VIRGINIA.

ROTARY ENGINE.

SPECIFICATION forming part of Letters Patent No. '7 50,169, dated. January 19, 1904.

Application led June 19, 1903. Serial No. 162,260. (No model.)

To a/ZZ whom it may concern:

Be it known that I, WILLIAM I. CooLnY, a citizen of the United States, and a resid ent of Saltvi'lle, in the county of Smyth and State of Virginia, have made a certain new and useful Invention in Rotary Engines; and I declare the following to be a full,rclear, and exact description of the same, such as will enable others skilled in the art to which it Aappertains to make and use the invention, reference being had to the accompanying drawings, and to letters and igures of reference marked thereon, which form a part of this specification.

Figure l is a perspective view illustrating the invention. Fig. 2 is a transverse vertical sectional view. Fig. 3 is a vertical sectional view showing the cut-o slide of one side in depressed position. Fig'. 4 is a vertical sectional view showing the cut-off slide of the opposite side in raised position.

The invention has relation to duplex compensatingrotary engines; and it consists in the novel construction and combinations of parts, as hereinafter set forth.

In the accompanying drawings, illustrating the invention, the casing is shown in three parts-the middle orbody portion a and the two heads The middle portion a is provided on each side with a large annular groove or channel c, which forms the inner portion of the piston-chamber for this side, the outer portion of this chamber beingformed by a corresponding annular groove or channel l in the cylinder-head, which is bolted to the middle portion. The shaft-bearings in the cylinder-heads are indicated at e, and f is the shaft which carries the pistons g and the valve-operating eccentric t. The steam-port of the piston-chamber is indicated at s. It leads from the valve-chamber Z and is designed to loe formed mainly in the middle portion a, of the casing. The exhaust-port of the pistonchamber is indicated at m. The inner wall of the large annular channel c of the middle portion of the casing is rabbeted at o to provide an abutment or bearing-face t, which lies in a plane parallel to but more toward the central vertical plane of the middle portion of the casing than the face of this portion. This abutment is therefore depressed der-head, as shown.

or set back suiiiciently to receive the pistonhead p insuch wise that the outer face of this piston-head is flush with the face of` the middle portion of the casing and works-against the `inner-face of the adjacent cylinder-head. This piston-head is not of great thickness; .but may be of suiici-ent diameter to give apowerful leverage to the piston-flange s, which has two lateral extensions or branches e, which project into the deep channels c of the midF dle portion of the casing and (l of the cylinder-head. In front and rear, however, the

contour of these lateral extensions is similar to that of the middle portion of this pistonlange. The forward face, therefore, of the piston-flange is shelving or of cam character, gradually extending backward and outward from the marginal portion of the piston-head in spiral form,'as indicated at 2. The rear face of the piston-ange is abrupt, as indi- .cated at 3.

Through the top portions of the casing-sections c and b, near the valve-chest 4, is formed on each side leading into the respective pistonchamber of that side an oblique or inclined slot 5, and in the concentric abutment portions of these parts of the casing or convex superficies of the abutments t is formed a rey,

ception notch or groove 6. The slot and groove or notch is made partly -in the middle portionof the casing and partly in the cylinsuch wise as to have movement across the circular chamber formed by the channels c and vd is a plane slide 7, which rests on the piston and is usually provided with a spring at its upper portion, as at r, designed to assist gravity in holding it in engagement with said pisl ton head and iiange during the rotation thereof. The slots of these cut-ofi1 slides7 open at the top of the casing and are provided with a cover-piece 8, which may be removed when desirable for inspection or other purpose. Each cut-ofi' slide has its lower edge beveled to correspond with the slope of the pistonliange, and said lower edge when the slide moves across the piston-channel enters the notch or groove 6, thereby enhancing the security of the cut-oil". Suitable packing-rings are designed to be applied in the usual man- Located in the slot in' IOO ner around the steamway or piston-chamber, and the piston-head should also be supplied with proper packing to prevent the escape of steam past the piston-fiange.

The valve-chest extends across the top of the middle portion t of the casing and is provided with steam-ports extending downward from its chamber and respectively in communication with the lateral pistonchambers. The valve 9 is designed to move in a reciprocatory manner in this chamber, first closing the port of one piston-chamber and opening that of the other and then returning, closing the port of the last and opening that of the first piston-chamber. This alternate action of the valve is designed to let steam into the piston-chambers alternately or in a compensating manner, the piston-flange of one piston having its position relatively opposite that of the piston-flange of the other piston. When, therefore, one piston-fiange is near the end of its stroke and approaching the cut-o slide of its chamber, the other piston-flange is at the opposite point in its chamber and is under the comparatively strong power of steam expansion. 4

The reciprocating motion of the valve is designed to be effected by means of an eccentric o1, which is located on the shaft outside the casing, its strap being connected to an anglelevler device q, which is connected to the valvero rlhe engine may be constructed to be reversible by flattening the opposite Harige-heads and adding an eXtra back-stop.

Having described this invention, what I claim, and desire to secure by Letters Patent, 1s-

l. In a rotary engine, the combination of the cylinder having the annular channels, the inclined slots, and the central abutments provided with notches in their convex superficies, the opposite laterally-extended cam-piston flanges of the piston-head, the shaft, the inclined cut-0E slides in said slots and engaging said notches, the springs for said slides, the reciprocating valve, and the eccentric on said shaft connected with said valve, substantially as specified.

2. In a rotary engine, the combination with the annularly-channeled middle portion of the casing, and the annularly-channeled cylinderheads, of the central abutments of the pistonchambers, the opposite laterally-extended piston-flanges of the piston-heads, the shaft, the slots of the casing, the inclined cut-off slides, their springs, the reciprocating valve, and its connections, and the eccentric on the shaft, substantially as specified.

In testimony whereof I affix my signature in presence of two witnesses.

W. I. COOLEY.

Witnesses:

J. T. BENNETT, JAS. LAPLEY. 

